Aye'cha wrote:Ive never managed a phpbb board, but i have SMF boards and when this happens, it was always a permissions issue to a directory.

That would be my guess too, and I have managed PHPBB installs. Unfortunately, I haven’t set one up in about a decade. I can’t recall if it’d be in tmp not 777 or the image directory. There’s also always the chance it could be something else. Without seeing it, ’tis all conjecture.